Communications – electrical: acoustic wave systems and devices – Echo systems
Patent
1986-05-16
1987-10-20
Tarcza, Thomas H.
Communications, electrical: acoustic wave systems and devices
Echo systems
367137, 367903, G01V 966, H04B 102
Patent
active
047018933
ABSTRACT:
An ultrasonic ranging system includes transformer means with a transformer which is selectively energized to produce a transducer drive signal. An ultrasonic transducer transmits an ultrasonic pulse in response to the drive signal and develops an echo signal upon receipt of an echo pulse derived from the ultrasonic pulse; a shunt switch is connected across a winding of the transformer and is selectively closed to quickly damp the ringing following the transmission of an ultrasonic pulse to a level substantially below the level of the echo signal to permit close ranging.
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Kujiwara, T.; "Development of a Mobile Robot for Security Guard".
"Towards Autonomous Vehicles", 1984 Annual Research Report, Robotics Institute, Carnegie-Mellon University, pp. 33-49, (1985).
Franklin Austin
George, II Robert W.
Muller Lon J.
Denning Mobile Robotics, Inc.
Denninger Douglas E.
Iandiorio Joseph S.
Pihulic Daniel T.
Tarcza Thomas H.
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